i've got a question right off the bat: what do you think the number-one health issue facing america is today? audience, throw it out. what do you think it is? [audience talks at once] obesity, heart disease, you've got diabetes. what do you think it is, jen? >> obesity, it has to be. >> yeah, obesity. according to health officials now, scientists, obesity is without question the number-one issue facing america today. but the frightening thing is-- and many people don't understand this-- but it is possible to be obese and lacking in nutrients at the same time. it's not just about how much we're consuming, but it's the quality of the food that we're consuming that's so important. >> wow.